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hayloiuy

04-21-2011 12:19 AM

Creating bash file that changes decimal to binary using obase

Code:

#!/bin/bash



echo 'obase=2;10'|bc 



current_version=$1

echo $current_version



echo  'obase=2; $current_version'|bc    > BinVer.txt

What is the problem? The terminal tells me the $ sign is illegal. Help?

David the H.

04-21-2011 12:47 AM

Code:

echo 'obase=2; $current_version' | bc

When you put single-quotes around a text string, everything inside them becomes literal. You need to use double-quotes if you want variables to expand.
(double-quotes don't escape $`\, or ! when history expansion is enabled).

Code:

echo "obase=2; $current_version" | bc

Edit: this is bash pitfall #28
http://mywiki.wooledge.org/BashPitfa...d_bye.2BAC8.27

nsit_poison

04-21-2011 01:05 AM

Read this.
http://www.unix.com/shell-programmin...base-help.html

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